I've been most impressed with Pydantic AI [1], so much so that we ended up building an SDK around it specifically for LLM workflows on Airflow [2].

[1] https://ai.pydantic.dev

[2] https://github.com/astronomer/airflow-ai-sdk

i have seen a ton of good ones, and they all have ups and downs. I think rather than focusing on frameworks though, I'm trying to dig into what goes into them, and what's the tradeoff if you try to build most of it yourself instead

but since you asked, to name a few

- ts: mastra, gensx, vercel ai, many others! - python: crew, langgraph, many others!

I'm currently using agno after seeing Google and OpenAI both chose pretty much the same syntax for their agent SDKs. So far so good